XDA would suggest otherwise.

maybe not for getting windows running natively on a droid but yeah they certainly do their shit unpaid.

cyanogen were a scam tho. go nuts showing off oneplus gave them a contract without checking them out first, quietly dropped them when they realised it was a bunch of teenagers copypasting someone elses code and their 'customer support' is users abusing the shit out of each other.

Hundreds, probably even thousands, of labor-of-love projects out there being done without pay. Probably wouldn't have as much fun with vintage computers these days as we (ok, just me here) do now without these labor-of-love people.